MAIDUGURI, Nigeria, Feb 12 (Reuters) - Gunmen from Islamist sect Boko Haram killed 51 people in an attack on a town in northeast Nigeria, witnesses said on Wednesday, in a region where President Goodluck Jonathan's troops are struggling to contain its insurgency.

Dozens of Boko Haram fighters speeding along in trucks painted in military colours and armed with automatic weapons and explosives stormed Konduga...